نتایج جستجو برای: channel capacity
تعداد نتایج: 488735 فیلتر نتایج به سال:
We present a new model for multipleinput multiple-output (MIMO) outdoor wireless fading channels which is more general and realistic than the usual i.i.d. model. We investigate the channel capacity as a function of parameters such as the local scattering radius at the transmitter and the receiver, the distance between the transmit (TX) and receive (RX) arrays, and the antenna beamwidths and spa...
We obtain n e w entropy and m u t u a l information formulae for regenerative stochastic processes. We use them on Markov channels to generalize the resul ts i n Goldsmi th and Varaiya [3]. Also w e obtain tighter bounds on capaci ty and better algori thms than in [3].
We examine the problem of assigning and reassigning orthogonal variable spreading factor (OVSF) codes at the forward link in 3G mobile communications systems employing WCDMA. Efficient channelization code management results in high code utilization and increased system capacity. We introduce a new code selection scheme, which, by means of a very simple measure, attempts to mitigate the problem ...
We proposed a practical ECG compression system which is beneficial for tele-monitoring cardiovascular diseases. There are two steps in the compression framework. First, we partition ECG signal into segments according to Rto R-wave periods. The partition aims at achieving more stable statistical features between segments of ECG signal which is beneficial for saving bit rates. After the partition...
Cooperative communication is an active area of research today. It enables nodes to achieve spatial diversity, thereby achieving tremendous improvement in system capacity and delay. Due to its immense potential, extensive investigations have been directed to closely examine its performance by means of both analysis and simulation. However, the study of this new technology in an implementation ba...
t,r;insrnit.. Depending on the presence or absence of ot.lier users, each user will be able to achieve different rates. In particular. certain bit,s n-ill be .received in the absence of other users but not in t,he presence of other users. Since some transniitted bits mill be lost owing to collisions. the capacit.y lve consider is maxiinurn rel iablyreceived rate rather than niasiiiium rel iably...
Molecular communication in nanonetworks is an emerging communication paradigm where molecules are used as information carriers. Concentration Shift Keying (CSK) and Molecule Shift Keying (MoSK) are being studied extensively for the short and medium range molecular nanonetworks. It is observed that MoSK outperforms CSK. However, MoSK requires different types of molecules for encoding which rende...
performances of unsuited repertories to singer’s vocal and technical features can cause increasing risks of vocal effort (ve) and fatigue or glottis injury (Gi), then it’s important to find the right repertory for artist’s vocal and technical features. We made manual voice range profiles (vrp) and interviews regarding performed, studied or not studied roles in professional singers. the dynamic ...
This report describes the analysis that underlies the new design of the ancillary services markets adopted at the May 8 meeting of the Trust Advisory Committee. The main features are two-part bids, selection of resources based solely on capacity reservation bids, merit ordering of accepted resources in order of energy bids, and energy settlements based on prices in the real-time market. This de...
Effect of antenna polarization on the capacity of a multiple element system in an indoor environment
In this paper, we analyze the behavior of a multiple element antenna system in an indoor environment based on the measurements taken in the Lucent Bell Labs building in Crawford Hill, NJ, with a system of 12 transmitters and 15 receivers. In particular, we investigate the capacity behavior with respect to the polarization of the transmitting/receiving elements and the distance between the trans...
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